content: /**
   * Copyright (c) 2016-present, RxJava Contributors.
   *
   * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
   * compliance with the License. You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software distributed under the License is
   * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See
   * the License for the specific language governing permissions and limitations under the License.
   */
  
  package io.reactivex.observable.internal.operators;
  
  import static org.mockito.ArgumentMatchers.any;
  import static org.mockito.Mockito.*;
  
  import java.util.*;
  import java.util.concurrent.*;
  
  import org.junit.*;
  import org.mockito.Mockito;
  
  import io.reactivex.common.exceptions.TestException;
  import io.reactivex.observable.*;
  import io.reactivex.observable.Observable;
  import io.reactivex.observable.Observer;
  
  public class ObservableToListTest {
  
      @Test
      public void testListObservable() {
          Observable<String> w = Observable.fromIterable(Arrays.asList("one", "two", "three"));
          Observable<List<String>> observable = w.toList().toObservable();
  
          Observer<List<String>> observer = TestHelper.mockObserver();
          observable.subscribe(observer);
          verify(observer, times(1)).onNext(Arrays.asList("one", "two", "three"));
          verify(observer, Mockito.never()).onError(any(Throwable.class));
          verify(observer, times(1)).onComplete();
      }
  
      @Test
      public void testListViaObservableObservable() {
          Observable<String> w = Observable.fromIterable(Arrays.asList("one", "two", "three"));
          Observable<List<String>> observable = w.toList().toObservable();
  
          Observer<List<String>> observer = TestHelper.mockObserver();
          observable.subscribe(observer);
          verify(observer, times(1)).onNext(Arrays.asList("one", "two", "three"));
          verify(observer, Mockito.never()).onError(any(Throwable.class));
          verify(observer, times(1)).onComplete();
      }
  
      @Test
      public void testListMultipleSubscribersObservable() {
          Observable<String> w = Observable.fromIterable(Arrays.asList("one", "two", "three"));
          Observable<List<String>> observable = w.toList().toObservable();
  
          Observer<List<String>> o1 = TestHelper.mockObserver();
          observable.subscribe(o1);
  
          Observer<List<String>> o2 = TestHelper.mockObserver();
          observable.subscribe(o2);
  
          List<String> expected = Arrays.asList("one", "two", "three");
  
          verify(o1, times(1)).onNext(expected);
          verify(o1, Mockito.never()).onError(any(Throwable.class));
          verify(o1, times(1)).onComplete();
  
          verify(o2, times(1)).onNext(expected);
          verify(o2, Mockito.never()).onError(any(Throwable.class));
          verify(o2, times(1)).onComplete();
      }
  
      @Test
      @Ignore("Null values are not allowed")
      public void testListWithNullValueObservable() {
          Observable<String> w = Observable.fromIterable(Arrays.asList("one", null, "three"));
          Observable<List<String>> observable = w.toList().toObservable();
  
          Observer<List<String>> observer = TestHelper.mockObserver();
          observable.subscribe(observer);
          verify(observer, times(1)).onNext(Arrays.asList("one", null, "three"));
          verify(observer, Mockito.never()).onError(any(Throwable.class));
          verify(observer, times(1)).onComplete();
      }
  
      @Test
      public void testListWithBlockingFirstObservable() {
          Observable<String> o = Observable.fromIterable(Arrays.asList("one", "two", "three"));
          List<String> actual = o.toList().toObservable().blockingFirst();
          Assert.assertEquals(Arrays.asList("one", "two", "three"), actual);
      }
  
      @SuppressWarnings("unchecked")
      @Test
      public void capacityHintObservable() {
          Observable.range(1, 10)
          .toList(4)
          .toObservable()
          .test()
          .assertResult(Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10));
      }
  
      @Test
      public void testList() {
          Observable<String> w = Observable.fromIterable(Arrays.asList("one", "two", "three"));
          Single<List<String>> observable = w.toList();
  
          SingleObserver<List<String>> observer = TestHelper.mockSingleObserver();
          observable.subscribe(observer);
          verify(observer, times(1)).onSuccess(Arrays.asList("one", "two", "three"));
          verify(observer, Mockito.never()).onError(any(Throwable.class));
      }
  
      @Test
      public void testListViaObservable() {
          Observable<String> w = Observable.fromIterable(Arrays.asList("one", "two", "three"));
          Single<List<String>> observable = w.toList();
  
          SingleObserver<List<String>> observer = TestHelper.mockSingleObserver();
          observable.subscribe(observer);
          verify(observer, times(1)).onSuccess(Arrays.asList("one", "two", "three"));
          verify(observer, Mockito.never()).onError(any(Throwable.class));
      }
  
      @Test
      public void testListMultipleSubscribers() {
          Observable<String> w = Observable.fromIterable(Arrays.asList("one", "two", "three"));
          Single<List<String>> observable = w.toList();
  
          SingleObserver<List<String>> o1 = TestHelper.mockSingleObserver();
          observable.subscribe(o1);
  
          SingleObserver<List<String>> o2 = TestHelper.mockSingleObserver();
          observable.subscribe(o2);
  
          List<String> expected = Arrays.asList("one", "two", "three");
  
          verify(o1, times(1)).onSuccess(expected);
          verify(o1, Mockito.never()).onError(any(Throwable.class));
  
          verify(o2, times(1)).onSuccess(expected);
          verify(o2, Mockito.never()).onError(any(Throwable.class));
      }
  
      @Test
      @Ignore("Null values are not allowed")
      public void testListWithNullValue() {
          Observable<String> w = Observable.fromIterable(Arrays.asList("one", null, "three"));
          Single<List<String>> observable = w.toList();
  
          SingleObserver<List<String>> observer = TestHelper.mockSingleObserver();
          observable.subscribe(observer);
          verify(observer, times(1)).onSuccess(Arrays.asList("one", null, "three"));
          verify(observer, Mockito.never()).onError(any(Throwable.class));
      }
  
      @Test
      public void testListWithBlockingFirst() {
          Observable<String> o = Observable.fromIterable(Arrays.asList("one", "two", "three"));
          List<String> actual = o.toList().blockingGet();
          Assert.assertEquals(Arrays.asList("one", "two", "three"), actual);
      }
  
      static void await(CyclicBarrier cb) {
          try {
              cb.await();
          } catch (InterruptedException ex) {
              ex.printStackTrace();
          } catch (BrokenBarrierException ex) {
              ex.printStackTrace();
          }
      }
  
      @SuppressWarnings("unchecked")
      @Test
      public void capacityHint() {
          Observable.range(1, 10)
          .toList(4)
          .test()
          .assertResult(Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10));
      }
  
      @Test
      public void dispose() {
          TestHelper.checkDisposed(Observable.just(1).toList().toObservable());
  
          TestHelper.checkDisposed(Observable.just(1).toList());
      }
  
      @SuppressWarnings("unchecked")
      @Test
      public void error() {
          Observable.error(new TestException())
          .toList()
          .toObservable()
          .test()
          .assertFailure(TestException.class);
      }
  
      @SuppressWarnings("unchecked")
      @Test
      public void errorSingle() {
          Observable.error(new TestException())
          .toList()
          .test()
          .assertFailure(TestException.class);
      }
  
      @SuppressWarnings("unchecked")
      @Test
      public void collectionSupplierThrows() {
          Observable.just(1)
          .toList(new Callable<Collection<Integer>>() {
              @Override
              public Collection<Integer> call() throws Exception {
                  throw new TestException();
              }
          })
          .toObservable()
          .test()
          .assertFailure(TestException.class);
      }
  
      @SuppressWarnings("unchecked")
      @Test
      public void collectionSupplierReturnsNull() {
          Observable.just(1)
          .toList(new Callable<Collection<Integer>>() {
              @Override
              public Collection<Integer> call() throws Exception {
                  return null;
              }
          })
          .toObservable()
          .test()
          .assertFailure(NullPointerException.class)
          .assertErrorMessage("The collectionSupplier returned a null collection. Null values are generally not allowed in 2.x operators and sources.");
      }
  
      @SuppressWarnings("unchecked")
      @Test
      public void singleCollectionSupplierThrows() {
          Observable.just(1)
          .toList(new Callable<Collection<Integer>>() {
              @Override
              public Collection<Integer> call() throws Exception {
                  throw new TestException();
              }
          })
          .test()
          .assertFailure(TestException.class);
      }
  
      @SuppressWarnings("unchecked")
      @Test
      public void singleCollectionSupplierReturnsNull() {
          Observable.just(1)
          .toList(new Callable<Collection<Integer>>() {
              @Override
              public Collection<Integer> call() throws Exception {
                  return null;
              }
          })
          .test()
          .assertFailure(NullPointerException.class)
          .assertErrorMessage("The collectionSupplier returned a null collection. Null values are generally not allowed in 2.x operators and sources.");
      }
  }
  